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Altera_Forum's avatar
Altera_Forum
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16 years ago

Video Clocked output and VGA

Hi all. I am using a DE2 , and I am trying to show RGB test pattern generator on the VGA. I am using vip to genereate the colour bars, but i have not benn able to fully understand the way VCO wo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Well,

I am tryng to use buffering for video streams in my system.

To buffer an 640*480 video frame, i need at least 1.2Mb of memory, so i have to use sdram.

This sdram is an SDR (the DE2 has only a 8M SDR sdram), and in a tutorial for the sdram they(Altera) say that sdram need a -3ns delay.

So, my system is this:http://img62.imageshack.us/img62/7727/videotest.png (http://img62.imageshack.us/i/videotest.png/)

But the output is still incorrect, and i don't know why.

and If I use buffer inside the deinterlacer, I have the same troubles...